function [c,ceq,dc,dceq] = fun11(x)
c = [x(1)*x(2) - x(1) - x(2) + 1.5;
    -x(1) * x(2) - 10];
dc = [x(2) - 1,-x(2);
    x(1) - 1,-x(1)];
ceq = [];dceq = [];